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Modeled Recycled Aggregate Concrete

  • Jianzhuang XiaoEmail author
Chapter
Part of the Springer Tracts in Civil Engineering book series (SPRTRCIENG)

Abstract

Based on the microstructure analysis, recycled aggregate concrete (RAC) can be described as a five-phase composite that consists of natural aggregates (NA), old interfacial transition zone (old ITZ), old mortar, new interfacial transition zone (new ITZ) and new mortar. Due to the relatively low quality of the ITZs and old mortar compared to other phases, new micro cracks normally occurred in these regions first when RAC was under loading. Modeled recycled aggregate concrete (MRAC) which was composed of the new mortar matrix and some circular recycled coarse aggregate (RCA) discs embedded in a rectangular array. It is demonstrated that MRAC can be used to investigate the relation between the mesostructure of each phase and the mechanical behavior including static and dynamic as well as chloride diffusion properties of RAC. The obtained results indicated that the fracture process and crack pattern of MRAC were greatly affected by the relative strength of new mortar and old mortar. It was also found that the failure pattern of RAC was related to the water to cement ratio of the mixture.

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Copyright information

© Springer-Verlag GmbH Germany 2018

Authors and Affiliations

  1. 1.College of Civil EngineeringTongji UniversityShanghaiChina

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